Definition: In this task, you are given an input list A. You need to extract and sort the unique digits used in the list in ascending order. Return -1 if there is no digit in the list.
Input: ['169', 'x', 'x', 'a', 'n', '389', 'z', '271', '229']

1, 2, 3, 6, 7, 8, 9